chore(deps-dev): bump test-unit in /fluent-plugin-enhance-k8s-metadata

Bumps [test-unit](https://github.com/test-unit/test-unit) from 3.6.1 to 3.6.2.
- [Release notes](https://github.com/test-unit/test-unit/releases)
- [Commits](test-unit/test-unit@3.6.1...3.6.2)

---
updated-dependencies:
- dependency-name: test-unit
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

fluent-plugin-enhance-k8s-metadata/Gemfile.lock

@@ -100,7 +100,7 @@ GEM
       sigdump (~> 0.2.2)
     sigdump (0.2.5)
     strptime (0.2.5)
-    test-unit (3.6.1)
+    test-unit (3.6.2)
       power_assert
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)